Something has caused the shim-signed package to be installed on your system, despite your system not being detected as an EFI system. We have seen reports of this, but have yet to identify the source of the problem. Could you attach the output of 'sudo dmidecode' from your system? That might help.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1639458 Title: package shim-signed 1.21.3+0.9+1465500757.14a5905.is.0.8-0ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1639458/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs